I have no history reading Laptop Magazine test results, so I can't say whether they have an Apple bias. If you think they do, then you can read the result accordingly.

I don't put much value on the "next version will be much better" argument. I suspect every software release claims to be "better" in some ways. Android 4.1 may be better, I have no idea. iOS 6.1 may be better, I have no idea. The tests are what they are, when they were.

I only found one other actual test with a bit more time spent searching, and it had the iPhone5 4-6% worse in battery life than the 4/4s. Combining the two data sets, the 5 still seems about the same or better.

If battery life is your prime concern, a Razr Maxx is what you need. I've been on and off all day and am at 48% remaining, so it's good enough for me. Though I do wish it had a replacable battery. I always had 2-3 BB batteries and when it did die, it was 5 min back to 100%. Needing to wait for a charge, and having only 1 cable now that my old ones are obsolete, is a pain. And I still miss my keyboard.